From: Peter Griffin <peter.griffin@xxxxxxxxxx>
[ Upstream commit d2b0680cf3b05490b579e71b0df6e07451977745 ]
of_parse_phandle() returns a device_node with refcount incremented, which
the callee needs to call of_node_put() on when done. We should only call
of_node_put() when the property argument is provided though as otherwise
nothing has taken a reference on the node.
Fixes: 45330bb43421 ("mfd: syscon: Allow property as NULL in syscon_regmap_lookup_by_phandle")
Signed-off-by: Peter Griffin <peter.griffin@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240220115012.471689-2-peter.griffin@xxxxxxxxxx
Signed-off-by: Lee Jones <lee@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/mfd/syscon.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
index 552b1861adad4..75c732ee9ed6e 100644
--- a/drivers/mfd/syscon.c
+++ b/drivers/mfd/syscon.c
@@ -224,7 +224,9 @@ struct regmap *syscon_regmap_lookup_by_phandle(struct device_node *np,
return ERR_PTR(-ENODEV);
regmap = syscon_node_to_regmap(syscon_np);
- of_node_put(syscon_np);
+
+ if (property)
+ of_node_put(syscon_np);
return regmap;
}
--
2.43.0
